Select outbound internet address from list

I have an R6.0.1 CF1 server which is configured for multiple internet domains. Receiving mail works fine. Sending also works, but is there a way to prompt the user to select what outgoing mail address he wants to use (there are multiple addresses listed in his person doc). Outlook Express does this if it’s configured with multiple accounts. Any help is greatly appreciated!

Subject: Select outbound internet address from list

I think the only way is to use different “Locations” for each address.You can specify the “Internet address” in the Basics section in each location.

Drawback: you must switch to the right location BEFORE you start the mail (or save it as draft, then switch locations and send).